A method of determining the orientation of a robotic machine at a worksite contemplates providing a target on the machine, moving the target to a first position on said machine, determining the location of the first position in the worksite, moving the target to a second position on said machine, and determining location of the second position in the worksite. An embodiment of the present invention further discloses a multi-core image encoding device. Displays with an operating power consumption density of not more than 65 mWcm2 when operating at 78 mWcm2 at 100% full white are also provided. An overcurrent protector is provided for opening the stator coil circuit when current in the stator coil exceeds a predetermined value. In order to provide a good response of the wet clutch, the support elements for the friction surfaces and for the opposite friction surfaces of the wet clutch are axially supported relative to one another, at least over a partial portion of the actuation travel of the wet clutch.